SLES and SLS are both anionic sulphate surfactants built from the same fatty-alcohol backbone, but the "E" in SLES — an ethoxylation step — changes enough about how each behaves that formulators don't use them interchangeably.
SLES (Sodium Lauryl Ether Sulphate)
SLES is the ethoxylated version, which makes it milder on skin and eyes than SLS at equivalent concentration, more soluble in cold water, and generally the preferred choice for personal-care formulations — shampoos, body washes, liquid hand soaps — where mildness matters. We stock it as both liquid and paste: see SLES Liquid (27%) and SLES Paste (70%), plus the Godrej-branded SLES range (P24-170 through P24-370 and L24-230) for formulators who specify a particular viscosity/concentration grade.
SLS (Sodium Lauryl Sulphate)
SLS is the non-ethoxylated form — a stronger, sharper surfactant with excellent foaming and cleaning power, and generally the more cost-effective option. It's the standard choice for heavier-duty cleaning formulations, toothpaste (at controlled low levels), and industrial/institutional cleaners where maximum foam and grease-cutting matter more than mildness.
See SLS Powder — Sodium Lauryl Sulphate.
Which One Should You Choose?
For skin- or eye-contact personal-care products, SLES is almost always the better-tolerated choice. For heavy-duty cleaning, degreasing, or where cost per kilogram of active foam-and-clean performance matters more than mildness, SLS is usually the more efficient pick. Many detergent formulations actually blend the two to balance foam, cost and mildness — our team can talk through ratios for your specific formulation.